Ok 2012 Mazda 3.
First post here btw.
Ok brakes were great. Sensitive and reactive. Last weekend we went 5mph on a bumpy road. Parked. Hiked and returned 3 hours later. Right away I noticed I had no brakes. Pedal goes to floor and right then it tries to grab. Even at 5-8mph it rolled few feet. No lights. No abs ect.
Hit pavement and instantly returned. Next day I was on road again and did it again and returned to normal. 80mph home and all is well.
Today another road did it. Removed abs fuse and still there. Few minutes it went away. And 120 miles since was great.
What the heck…i could start replacing things but what would cause it over and over going walking speed to make it loose pressure. It never gets hard. No leaks. Just travels further…and bottoms out